Hearing aid part



FIG. 1 is a perspective view of the rear and side of a hearing aid partaccording to a first embodiment;

FIG. 2 is a front view thereof. The broken lines in FIG. 2 are includedfor the purpose of illustrating a portion of the hearing aid part thatforms no part of the claimed design;

FIG. 3 is a side view; and,

FIG. 4 is a rear view.

The ornamental design for a hearing aid part, as shown and described.